Dragging heavy feet

Some languages have a requirement than every (stressed) syllable is
heavy, so for instance in Swedish [takk] could be a word, and so could
[tA:k], but [tak] can’t; it needs an extra mora.

Do there exist languages in which *feet* must be heavy so that for
instance (assuming initial stress), all of these are valid feet:

 - takka
    MM M    (M represents moraic segments)
 - taak
    MMM
 - tank
    MMM
 - takaa
    M MM
 - taaka
    MM M
 - takan
    M MM
 - takkan
    MM MM
 - taakan
    MM MM
 - taakaan
    MM MMM

But these are not:

 * ta
    M
 * taa
    MM
 * tak
    MM
 * taka
    M M

--
Tristan.

Replies